CN114183262B - Direct-injection hydrogen internal combustion engine in jet ignition cylinder of precombustion chamber and control method - Google Patents

Direct-injection hydrogen internal combustion engine in jet ignition cylinder of precombustion chamber and control method Download PDF

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Publication number
CN114183262B
CN114183262B CN202111494422.5A CN202111494422A CN114183262B CN 114183262 B CN114183262 B CN 114183262B CN 202111494422 A CN202111494422 A CN 202111494422A CN 114183262 B CN114183262 B CN 114183262B
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hydrogen
signal
pressure
control unit
electronic control
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CN114183262A (en
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纪常伟
洪琛
汪硕峰
杨金鑫
辛固
孟昊
常珂
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Beijing University of Technology
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Beijing University of Technology
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3094—Controlling fuel injection the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0611—Fuel type, fuel composition or fuel quality
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0614—Actual fuel mass or fuel injection amount
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The invention provides a direct-injection hydrogen internal combustion engine in a jet ignition cylinder of a precombustion chamber and a control method thereof, and particularly relates to a system design of the direct-injection hydrogen internal combustion engine in the jet ignition cylinder of the precombustion chamber and a control method of the direct-injection hydrogen internal combustion engine in the jet ignition cylinder of the precombustion chamber. The invention is based on a precombustion chamber diesel engine, replaces a main combustion chamber nozzle of the diesel engine with a high-pressure hydrogen direct injection nozzle, installs the high-pressure hydrogen direct injection nozzle and a spark plug in the precombustion chamber of the diesel engine, and reforms the precombustion chamber diesel engine into a direct injection hydrogen internal combustion engine in a jet ignition cylinder of the precombustion chamber, thereby realizing the application of the direct injection hydrogen internal combustion engine in the cylinder with high compression ratio, no throttle valve, high explosion pressure resistance, jet ignition, layering and diffusion combustion; meanwhile, the invention provides an injection strategy of the main combustion chamber and an injection and ignition strategy of the precombustion chamber, and the high performance of the direct-injection hydrogen internal combustion engine in the jet ignition cylinder of the precombustion chamber and the stable operation of the whole engine are realized through the specific control of the electric control unit.

Description

Direct-injection hydrogen internal combustion engine in jet ignition cylinder of precombustion chamber and control method
Technical Field
The invention provides a direct-injection hydrogen internal combustion engine in a jet ignition cylinder of a precombustion chamber and a control method thereof, in particular relates to a system design of the direct-injection hydrogen internal combustion engine in the jet ignition cylinder of the precombustion chamber and a control method of the direct-injection hydrogen internal combustion engine in the jet ignition cylinder of the precombustion chamber, and belongs to the field of internal combustion engines.
Background
Global warming is a serious worldwide problem, and this climate warming is largely due to the use of fossil fuels in transportation. Although internal combustion engines are still in the global dominance in the transportation field, the support of fuel cells and electric vehicles by many policies compresses the living space of the internal combustion engines, which is urgently needed to achieve fundamental technological breakthroughs, thereby significantly reducing harmful emissions and reliance on fossil fuels. Hydrogen is expected to be an excellent fuel for replacing the traditional fossil fuel as the internal combustion engine for vehicles because of the characteristics of cleanness, continuous regeneration and the like and the good combustion performance of the hydrogen for the automobile engine, and is widely paid attention to.
The hydrogen internal combustion engine is mainly classified into port injection and in-cylinder direct injection according to the fuel supply manner. Although the cost of the air inlet channel injection hydrogen internal combustion engine is lower, the characteristics of small volume density of hydrogen, low ignition energy and the like cause the air inlet channel injection hydrogen internal combustion engine to easily generate abnormal combustion phenomena such as pre-ignition, backfire, knocking and the like; the direct-injection hydrogen internal combustion engine with higher cost can fundamentally avoid backfire and greatly eliminate the probability of occurrence of pre-ignition and knocking, and in order to improve the performance of the direct-injection hydrogen internal combustion engine in the cylinder, numerous researchers propose injection strategies such as late injection, multiple injection, jet ignition and the like. The jet ignition is an excellent choice for realizing high-performance low-emission of the in-cylinder direct-injection hydrogen internal combustion engine, and the diesel engine with the precombustion chamber is an excellent choice for realizing jet ignition. The pre-combustion chamber diesel engine is basically eliminated nowadays, but the pre-combustion chamber diesel engine becomes an excellent carrier for burning hydrogen due to the excellent physicochemical property of the hydrogen, the air replacement effect of the hydrogen injected by the air inlet channel is overcome by late injection and direct injection of the hydrogen in the cylinder, the high-performance ignition of the hydrogen-air mixture of the main combustion chamber is realized by jet ignition of the pre-combustion chamber, the heat loss is reduced, and the heat efficiency is improved. In addition, the coupling of jet ignition and direct in-cylinder injection allows the engine to operate at a lower fuel-air equivalent ratio, as combustion begins from the prechamber, less fuel is required to multi-point inject the hot reactant gases in the prechamber into the main combustion chamber through the jet orifices, accelerating the oxidation exotherm of the main combustion chamber hydrogen-air.
In summary, in view of the excellent coupling effect of jet ignition of the precombustor and direct injection of hydrogen in the cylinder, the invention is based on the precombustor diesel engine, the main combustion chamber nozzle of the diesel engine is replaced by the high-pressure hydrogen direct injection nozzle, the high-pressure hydrogen direct injection nozzle and the spark plug are arranged in the precombustor of the diesel engine, and the precombustor diesel engine is modified into the direct injection hydrogen internal combustion engine in the jet ignition cylinder of the precombustor, so that the application of the direct injection hydrogen internal combustion engine with high compression ratio, no throttle valve, high explosion pressure resistance, jet ignition, layering and diffusion combustion is realized; meanwhile, the invention provides an injection strategy of the main combustion chamber and an injection and ignition strategy of the precombustion chamber, and the high performance of the direct-injection hydrogen internal combustion engine in the jet ignition cylinder of the precombustion chamber and the stable operation of the whole engine are realized through the specific control of the electric control unit.
Disclosure of Invention
The direct-injection hydrogen internal combustion engine in the jet ignition cylinder of the precombustion chamber comprises an air inlet pipeline P1, wherein an air filter 2, an air inlet flow sensor 3, an air inlet temperature sensor 4, an air inlet pressure sensor 5 and an air inlet pressure stabilizing chamber 6 are sequentially arranged on the air inlet pipeline P; an exhaust pipe P2, on which an exhaust pressure stabilizing chamber 17, an exhaust temperature sensor 18, a NOx concentration sensor 19, and an NSR catalytic system 20 are sequentially provided; the hydrogen supply pipeline P3 is sequentially provided with a main combustion chamber high-pressure hydrogen direct injection nozzle 13, a precombustion chamber high-pressure hydrogen direct injection nozzle 14, a flame-retardant valve 21, a hydrogen flow sensor 22 and a pressure reducing valve 23; a high-pressure hydrogen tank 1, a pre-chamber in-cylinder direct injection hydrogen internal combustion engine 7, a crank signal sensor 8, an in-cylinder pressure sensor 9, a pre-chamber 10, an excess air coefficient sensor 11, an in-cylinder temperature sensor 12, a pre-chamber spark plug 15, a rotation speed signal sensor 16 and an electric control unit ECU24;
the electronic control unit ECU24 receives the hydrogen flow signal a, the intake air flow signal b, the intake air temperature signal c, the intake air pressure signal d, the crank signal e, the in-cylinder pressure signal f, the in-cylinder temperature signal j, the excess air ratio signal k, the rotation speed signal l, the exhaust gas temperature signal m, and the NOx concentration signal n; sending out an in-cylinder hydrogen injection signal g, a pre-combustion chamber hydrogen injection signal h, a spark plug signal i and an NSR catalytic signal o;
a direct-injection hydrogen internal combustion engine in a jet ignition cylinder of a precombustion chamber and a control method thereof are provided:
the high-pressure hydrogen tank 1 can provide high-pressure hydrogen with pressure of more than 35 MPa; the main combustion chamber high-pressure hydrogen direct injection nozzle 13 and the precombustion chamber high-pressure hydrogen direct injection nozzle 14 can provide a maximum injection pressure of 30 MPa;
fresh air sequentially passes through an air filter 2, an air inlet flow sensor 3, an air inlet temperature sensor 4, an air inlet pressure sensor 5 and an air inlet pressure stabilizing chamber 6 from an air inlet pipeline P1 and enters a direct-injection hydrogen internal combustion engine 7 in a precombustion chamber cylinder, and an electronic control unit ECU24 calculates and obtains a hydrogen injection pulse width by receiving an air inlet flow signal b, an air inlet temperature signal c, an air inlet pressure signal d, a crankshaft signal e and a rotating speed signal l; the high-pressure hydrogen sequentially passes through a pressure reducing valve 23, a hydrogen flow sensor 22 and a flame-retardant valve 21 from a hydrogen supply pipeline P3 to enter a main combustion chamber high-pressure hydrogen direct-injection nozzle 13 and a precombustion chamber high-pressure hydrogen direct-injection nozzle 14; the electronic control unit ECU24 controls the main combustion chamber high-pressure hydrogen direct injection nozzle 13 to finish hydrogen injection at the top dead center by sending out an in-cylinder hydrogen injection signal g based on the hydrogen injection pulse width and adjusting the injection timing; the electronic control unit ECU24 sends out a precombustor hydrogen injection signal h at the closing moment of the air inlet valve to control the precombustor high-pressure hydrogen direct injection nozzle 14 to spray hydrogen, the electronic control unit ECU24 monitors the excessive air coefficient in the precombustor through the excessive air coefficient signal, and when the excessive air coefficient in the precombustor is equal to 1, the electronic control unit ECU24 sends out the precombustor hydrogen injection signal h to control the precombustor high-pressure hydrogen direct injection nozzle 14 to end hydrogen spraying; 5 CA before the top dead center, the electronic control unit ECU24 controls the ignition of the pre-combustion chamber spark plug 15 through a spark plug signal i, and the pre-combustion chamber 10 ignites the hydrogen in the main combustion chamber through jet flow; in the exhaust stage, the exhaust gas is discharged from the combustion chamber through the exhaust pipeline P2 sequentially through the exhaust pressure stabilizing chamber 17, the exhaust temperature sensor 18, the NOx concentration sensor 19 and the NSR catalytic system 20, and the electronic control unit ECU receives the NOx concentration signal n and sends out the NSR catalytic signal o to control the NSR catalytic system 20 to adsorb and desorb NOx.
The beneficial effects of the invention are mainly as follows: the invention is based on a precombustion chamber diesel engine, replaces a main combustion chamber nozzle of the diesel engine with a high-pressure hydrogen direct injection nozzle, installs the high-pressure hydrogen direct injection nozzle and a spark plug in the precombustion chamber of the diesel engine, and reforms the precombustion chamber diesel engine into a direct injection hydrogen internal combustion engine in a jet ignition cylinder of the precombustion chamber, thereby realizing the application of the direct injection hydrogen internal combustion engine in the cylinder with high compression ratio, no throttle valve, high explosion pressure resistance, jet ignition, layering and diffusion combustion; meanwhile, the invention provides an injection strategy of the main combustion chamber and an injection and ignition strategy of the precombustion chamber, and the high performance of the direct-injection hydrogen internal combustion engine in the jet ignition cylinder of the precombustion chamber and the stable operation of the whole engine are realized through the specific control of the electric control unit.
Drawings
FIG. 1 is a schematic diagram of a direct-injection hydrogen internal combustion engine in a jet ignition cylinder of a precombustion chamber
In the figure: 1. a high-pressure hydrogen tank, P1, an air inlet pipeline, 2, an air filter, 3, an air inlet flow sensor, 4, an air inlet temperature sensor, 5, an air inlet pressure sensor, 6, an air inlet pressure stabilizing chamber, 7, a precombustor in-cylinder direct injection hydrogen internal combustion engine, 8, a crank signal sensor, 9, an in-cylinder pressure sensor, 10, a precombustor, 11, an excess air coefficient sensor, 12, an in-cylinder temperature sensor, 13, a main combustion chamber high-pressure hydrogen direct injection nozzle, 14, a precombustor high-pressure hydrogen direct injection nozzle, 15, a precombustor spark plug, 16, a rotating speed signal sensor, P2, an exhaust pipeline, 17, an exhaust pressure stabilizing chamber, 18, an exhaust temperature sensor, 19, a NOx concentration sensor, 20, an NSR catalytic system, P3, a hydrogen supply pipeline, 21, a flame-retardant valve, 22, a hydrogen flow sensor, 23, a pressure reducing valve, 24 and an electronic control unit ECU;
a. hydrogen flow signal, b, intake flow signal, c, intake temperature signal, d, intake pressure signal, e, crankshaft signal, f, in-cylinder pressure signal, g, in-cylinder hydrogen injection signal, h, prechamber hydrogen injection signal, i, spark plug signal, j, in-cylinder temperature signal, k, excess air coefficient signal, l, rotational speed signal, m, exhaust temperature signal, n, NOx concentration signal, o, NSR catalytic signal.
Detailed Description
The invention is further described with reference to the drawings and detailed description which follow:
the high-pressure hydrogen tank (1) can provide high-pressure hydrogen with the pressure of more than 35 MPa; the main combustion chamber high-pressure hydrogen direct injection nozzle (13) and the precombustion chamber high-pressure hydrogen direct injection nozzle (14) can provide an injection pressure of 30MPa at maximum;
fresh air sequentially passes through an air filter (2), an air inlet flow sensor (3), an air inlet temperature sensor (4), an air inlet pressure sensor (5) and an air inlet pressure stabilizing chamber (6) through an air inlet pipeline (P1) and enters a direct-injection hydrogen internal combustion engine (7) in a precombustion chamber cylinder, and an electronic control unit ECU (24) calculates and obtains a hydrogen injection pulse width by receiving an air inlet flow signal b, an air inlet temperature signal c, an air inlet pressure signal d, a crankshaft signal e and a rotating speed signal l; the high-pressure hydrogen sequentially passes through a pressure reducing valve (23), a hydrogen flow sensor (22) and a flame-retardant valve (21) from a hydrogen supply pipeline (P3) to enter a main combustion chamber high-pressure hydrogen direct injection nozzle (13) and a precombustion chamber high-pressure hydrogen direct injection nozzle (14); an electronic control unit ECU (24) is used for enabling a main combustion chamber high-pressure hydrogen direct injection nozzle (13) to finish hydrogen injection at a top dead center by sending out an in-cylinder hydrogen injection signal g based on the hydrogen injection pulse width and adjusting the injection timing; the electronic control unit ECU (24) sends out a precombustion chamber hydrogen injection signal h at the closing time of the air inlet valve to control the precombustion chamber high-pressure hydrogen direct injection nozzle (14) to spray hydrogen, the electronic control unit ECU (24) monitors the excessive air coefficient in the precombustion chamber through the excessive air coefficient signal, and when the excessive air coefficient in the precombustion chamber is equal to 1, the electronic control unit ECU (24) sends out the precombustion chamber hydrogen injection signal h to control the precombustion chamber high-pressure hydrogen direct injection nozzle (14) to end hydrogen spraying; 5 degrees CA before the top dead center, an electronic control unit ECU (24) controls a pre-combustion chamber spark plug (15) to ignite through a spark plug signal i, and a pre-combustion chamber (10) ignites hydrogen in a main combustion chamber through jet flow; in the exhaust stage, exhaust gas sequentially passes through an exhaust pressure stabilizing chamber (17), an exhaust temperature sensor (18), a NOx concentration sensor (19) and an NSR catalytic system (20) through an exhaust pipeline (P2) to be discharged out of the combustion chamber, and an Electronic Control Unit (ECU) receives a NOx concentration signal n and sends an NSR catalytic signal o to control the adsorption and desorption of the NSR catalytic system (20) on NOx.

Claims (2)

1. A direct-injection hydrogen internal combustion engine in a jet ignition cylinder of a precombustion chamber is characterized in that: comprises an air inlet pipeline (P1), and an air filter (2), an air inlet flow sensor (3), an air inlet temperature sensor (4), an air inlet pressure sensor (5) and an air inlet pressure stabilizing chamber (6) are sequentially arranged on the air inlet pipeline; an exhaust pipeline (P2) which is sequentially provided with an exhaust pressure stabilizing chamber (17), an exhaust temperature sensor (18), a NOx concentration sensor (19) and an NSR catalytic system (20); a hydrogen supply pipeline (P3) which is sequentially provided with a main combustion chamber high-pressure hydrogen direct injection nozzle (13), a precombustion chamber high-pressure hydrogen direct injection nozzle (14), a flame-retardant valve (21), a hydrogen flow sensor (22) and a pressure reducing valve (23); the device also comprises a high-pressure hydrogen tank (1), a direct injection hydrogen internal combustion engine (7) in a precombustion chamber cylinder, a crank signal sensor (8), an in-cylinder pressure sensor (9), a precombustion chamber (10), an excessive air coefficient sensor (11), an in-cylinder temperature sensor (12), a precombustion chamber spark plug (15), a rotating speed signal sensor (16) and an electronic control unit ECU (24);
the electronic control unit ECU (24) is connected with the hydrogen flow sensor (22) and obtains a hydrogen flow signal a;
the electronic control unit ECU (24) is connected with the air inlet flow sensor (3) and obtains an air inlet flow signal b;
the electronic control unit ECU (24) is connected with the air inlet temperature sensor (4) and obtains an air inlet temperature signal c;
the electronic control unit ECU (24) is connected with the air inlet pressure sensor (5) and obtains an air inlet pressure signal d;
the electronic control unit ECU (24) is connected with the crankshaft signal sensor (8) and obtains a crankshaft signal e;
the electronic control unit ECU (24) is connected with the in-cylinder pressure sensor (9) and obtains an in-cylinder pressure signal f;
the electronic control unit ECU (24) is connected with the main combustion chamber high-pressure hydrogen direct injection nozzle (13) and controls the opening and closing of the main combustion chamber high-pressure hydrogen direct injection nozzle through a hydrogen injection signal g in the cylinder;
the electronic control unit ECU (24) is connected with the precombustor high-pressure hydrogen direct injection nozzle (14) and controls the opening and closing of the precombustor high-pressure hydrogen direct injection nozzle through a precombustor hydrogen injection signal h;
the electronic control unit ECU (24) is connected with the pre-combustion chamber spark plug (15) and controls the discharge of the pre-combustion chamber spark plug through a spark plug signal i;
the electronic control unit ECU (24) is connected with the in-cylinder temperature sensor (12) and obtains an in-cylinder temperature signal j;
the electronic control unit ECU (24) is connected with an excess air coefficient sensor (11) arranged in the precombustion chamber (10) and obtains an excess air coefficient signal k so as to monitor the excess air coefficient in the precombustion chamber (10);
the electronic control unit ECU (24) is connected with the rotating speed signal sensor (16) and obtains a rotating speed signal l;
the electronic control unit ECU (24) is connected with the exhaust gas temperature sensor (18) and obtains an exhaust gas temperature signal m;
the electronic control unit ECU (24) is connected with the NOx concentration sensor (19) and obtains a NOx concentration signal n;
the electronic control unit ECU (24) is connected with the NSR catalytic system (20) and controls the adsorption and desorption of NOx by the NSR catalytic system through an NSR catalytic signal o.
2. A method of using a prechamber jet ignition in-cylinder direct injection hydrogen internal combustion engine as in claim 1 wherein:
the high-pressure hydrogen tank (1) provides high-pressure hydrogen with the pressure of more than 35 MPa; the main combustion chamber high-pressure hydrogen direct injection nozzle (13) and the precombustion chamber high-pressure hydrogen direct injection nozzle (14) can provide an injection pressure of 30MPa at maximum;
fresh air sequentially passes through an air filter (2), an air inlet flow sensor (3), an air inlet temperature sensor (4), an air inlet pressure sensor (5) and an air inlet pressure stabilizing chamber (6) through an air inlet pipeline (P1) and enters a direct-injection hydrogen internal combustion engine (7) in a precombustion chamber cylinder, and an electronic control unit ECU (24) calculates and obtains a hydrogen injection pulse width by receiving an air inlet flow signal b, an air inlet temperature signal c, an air inlet pressure signal d, a crankshaft signal e and a rotating speed signal l; the high-pressure hydrogen sequentially passes through a pressure reducing valve (23), a hydrogen flow sensor (22) and a flame-retardant valve (21) from a hydrogen supply pipeline (P3) to enter a main combustion chamber high-pressure hydrogen direct injection nozzle (13) and a precombustion chamber high-pressure hydrogen direct injection nozzle (14); an electronic control unit ECU (24) is used for enabling a main combustion chamber high-pressure hydrogen direct injection nozzle (13) to finish hydrogen injection at a top dead center by sending out an in-cylinder hydrogen injection signal g based on the hydrogen injection pulse width and adjusting the injection timing; the electronic control unit ECU (24) sends out a precombustor hydrogen injection signal h at the closing time of the air inlet valve to control the precombustor high-pressure hydrogen direct injection nozzle (14) to spray hydrogen, the electronic control unit ECU (24) acquires an excessive air coefficient signal k through an excessive air coefficient sensor (11) arranged in the precombustor (10) to monitor the excessive air coefficient in the precombustor (10), and when the excessive air coefficient in the precombustor (10) is equal to 1, the electronic control unit ECU (24) sends out the precombustor hydrogen injection signal h to control the precombustor high-pressure hydrogen direct injection nozzle (14) to end hydrogen spraying; 5 degrees CA before the top dead center, an electronic control unit ECU (24) controls a pre-combustion chamber spark plug (15) to ignite through a spark plug signal i, and a pre-combustion chamber (10) ignites hydrogen in a main combustion chamber through jet flow; in the exhaust stage, exhaust gas sequentially passes through an exhaust pressure stabilizing chamber (17), an exhaust temperature sensor (18), a NOx concentration sensor (19) and an NSR catalytic system (20) through an exhaust pipeline (P2) to be discharged out of the combustion chamber, and an electronic control unit ECU (24) receives a NOx concentration signal n and sends an NSR catalytic signal o to control the NSR catalytic system (20) to adsorb and desorb NOx.
CN202111494422.5A 2021-12-08 2021-12-08 Direct-injection hydrogen internal combustion engine in jet ignition cylinder of precombustion chamber and control method Active CN114183262B (en)

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CN202111494422.5A CN114183262B (en) 2021-12-08 2021-12-08 Direct-injection hydrogen internal combustion engine in jet ignition cylinder of precombustion chamber and control method

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